Added the base framework for the SMPTE transitions and wipes.

Original commit message from CVS:
Added the base framework for the SMPTE transitions and wipes.

1 files changed, 409 insertions, 0 deletions

diff --git a/gst/smpte/gstsmpte.c b/gst/smpte/gstsmpte.c
new file mode 100644
index 00000000..536be8d4
--- /dev/null
+++ b/gst/smpte/gstsmpte.c
@@ -0,0 +1,409 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <string.h>
+#include <gstsmpte.h>
+#include "paint.h"
+
+/* elementfactory information */
+static GstElementDetails smpte_details = {
+  "SMPTE transitions",
+  "Filter/Video",
+  "LGPL",
+  "Apply the standard SMPTE transitions on video images",
+  VERSION,
+  "Wim Taymans <wim.taymans@chello.be>",
+  "(C) 2002",
+};
+
+GST_PAD_TEMPLATE_FACTORY (smpte_src_factory,
+  "src",
+  GST_PAD_SRC,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "smpte_src",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+  )
+)
+
+GST_PAD_TEMPLATE_FACTORY (smpte_sink1_factory,
+  "sink1",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "smpte_sink1",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
+     "width",	 GST_PROPS_INT_RANGE (0, 4096),
+     "height",	 GST_PROPS_INT_RANGE (0, 4096) 
+  )
+)
+
+GST_PAD_TEMPLATE_FACTORY (smpte_sink2_factory,
+  "sink2",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+   "smpte_sink2",
+   "video/raw",
+     "format",   GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
+     "width",	 GST_PROPS_INT_RANGE (0, 4096),
+     "height",	 GST_PROPS_INT_RANGE (0, 4096)
+  )
+)
+
+
+/* SMPTE signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  ARG_TYPE,
+};
+
+#define GST_TYPE_SMPTE_TRANSITION_TYPE (gst_smpte_transition_type_get_type())
+static GType
+gst_smpte_transition_type_get_type (void) 
+{
+  static GType smpte_transition_type = 0;
+  GEnumValue *smpte_transitions;
+
+  if (!smpte_transition_type) {
+    const GList *definitions;
+    gint i=0;
+
+    definitions = gst_mask_get_definitions ();
+    smpte_transitions = g_new0 (GEnumValue, g_list_length ((GList *)definitions)+1);
+
+    while (definitions) {
+      GstMaskDefinition *definition = (GstMaskDefinition *) definitions->data;
+      definitions = g_list_next (definitions);
+
+      smpte_transitions[i].value = definition->type;
+      smpte_transitions[i].value_name = definition->short_name;
+      smpte_transitions[i].value_nick = definition->long_name;
+      
+      i++;
+    }
+
+    smpte_transition_type = g_enum_register_static ("GstSMPTETransitionType", smpte_transitions);
+  }
+  return smpte_transition_type;
+}   
+
+
+static void	gst_smpte_class_init		(GstSMPTEClass *klass);
+static void	gst_smpte_init			(GstSMPTE *smpte);
+
+static void	gst_smpte_loop			(GstElement *element);
+
+static void	gst_smpte_set_property		(GObject *object, guint prop_id, 
+						 const GValue *value, GParamSpec *pspec);
+static void	gst_smpte_get_property		(GObject *object, guint prop_id, 
+						 GValue *value, GParamSpec *pspec);
+
+static GstElementClass *parent_class = NULL;
+/*static guint gst_smpte_signals[LAST_SIGNAL] = { 0 }; */
+
+static GType
+gst_smpte_get_type (void)
+{
+  static GType smpte_type = 0;
+
+  if (!smpte_type) {
+    static const GTypeInfo smpte_info = {
+      sizeof(GstSMPTEClass),      
+      NULL,
+      NULL,
+      (GClassInitFunc)gst_smpte_class_init,
+      NULL,
+      NULL,
+      sizeof(GstSMPTE),
+      0,
+      (GInstanceInitFunc)gst_smpte_init,
+    };
+    smpte_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSMPTE", &smpte_info, 0);
+  }
+  return smpte_type;
+}
+
+static void
+gst_smpte_class_init (GstSMPTEClass *klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass*)klass;
+  gstelement_class = (GstElementClass*)klass;
+
+  parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+  gobject_class->set_property = gst_smpte_set_property;
+  gobject_class->get_property = gst_smpte_get_property;
+
+  _gst_mask_init ();
+
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TYPE,
+    g_param_spec_enum ("type", "Type", "The type of transition to use",
+                       GST_TYPE_SMPTE_TRANSITION_TYPE, 1, G_PARAM_READWRITE));
+
+}
+
+/*                        wht  yel  cya  grn  mag  red  blu  blk   -I    Q */
+static int y_colors[] = { 255, 226, 179, 150, 105,  76,  29,  16,  16,   0 };
+static int u_colors[] = { 128,   0, 170,  46, 212,  85, 255, 128,   0, 128 };
+static int v_colors[] = { 128, 155,   0,  21, 235, 255, 107, 128, 128, 255 };
+
+static void
+fill_i420 (guint8 *data, gint width, gint height, gint color)
+{
+  guint8 *yp = data;
+  guint8 *up = data + width * height;
+  guint8 *vp = data + width * height + (width * height) / 4;
+  
+  gst_smpte_paint_rect (yp, width,   0, 0, width,   height,   y_colors[color]);
+  gst_smpte_paint_rect (up, width/2, 0, 0, width/2, height/2, u_colors[color]);
+  gst_smpte_paint_rect (vp, width/2, 0, 0, width/2, height/2, v_colors[color]);
+}
+
+static gboolean
+gst_smpte_sinkconnect (GstPad *pad, GstCaps *caps)
+{
+  GstSMPTE *smpte;
+
+  smpte = GST_SMPTE (gst_pad_get_parent (pad));
+
+  if (!GST_CAPS_IS_FIXED (caps))
+    return GST_PAD_CONNECT_DELAYED;
+
+  gst_caps_get_int (caps, "width", &smpte->width);
+  gst_caps_get_int (caps, "height", &smpte->height);
+
+  smpte->mask = gst_mask_factory_new (smpte->type, 8, smpte->width, smpte->height);
+
+  /* forward to the next plugin */
+  return gst_pad_try_set_caps(smpte->srcpad, gst_caps_copy_1(caps));
+}
+
+static void 
+gst_smpte_init (GstSMPTE *smpte)
+{
+  smpte->sinkpad1 = gst_pad_new_from_template (
+		  GST_PAD_TEMPLATE_GET (smpte_sink1_factory), "sink1");
+  gst_pad_set_connect_function (smpte->sinkpad1, gst_smpte_sinkconnect);
+  gst_element_add_pad (GST_ELEMENT (smpte), smpte->sinkpad1);
+
+  smpte->sinkpad2 = gst_pad_new_from_template (
+		  GST_PAD_TEMPLATE_GET (smpte_sink2_factory), "sink2");
+  gst_pad_set_connect_function (smpte->sinkpad2, gst_smpte_sinkconnect);
+  gst_element_add_pad (GST_ELEMENT (smpte), smpte->sinkpad2);
+
+  smpte->srcpad = gst_pad_new_from_template (
+		  GST_PAD_TEMPLATE_GET (smpte_src_factory), "src");
+  gst_element_add_pad (GST_ELEMENT (smpte), smpte->srcpad);
+
+  gst_element_set_loop_function (GST_ELEMENT (smpte), gst_smpte_loop);
+
+  smpte->width = 320;
+  smpte->height = 200;
+  smpte->duration = 64;
+  smpte->position = 0;
+  smpte->type = 1;
+  smpte->mask = gst_mask_factory_new (smpte->type, 8, smpte->width, smpte->height);
+}
+
+static void
+gst_smpte_blend_i420 (guint8 *in1, guint8 *in2, guint8 *out, GstMask *mask,
+		      gint width, gint height)
+{
+  gint i, j;
+  guint8 *maskporig, *maskp;
+  guint8 *in1u, *in1v, *in2u, *in2v, *outu, *outv; 
+  guint8 value;
+  gint chromsize = (width * height) >> 2;
+
+  maskp = maskporig = mask->data;
+  
+  for (i = width * height; i; i--) {
+    value = *maskp++;
+    *out++ = ((*in2++ * value) + (*in1++ * (255 - value))) >> 8;
+  }
+  in1u = in1; in1v = in1 + chromsize;
+  in2u = in2; in2v = in2 + chromsize;
+  outu = out; outv = out + chromsize;
+
+  maskp = maskporig;
+  for (i = height/2; i; i--, maskp += width) {
+    for (j = width/2; j; j--, maskp += 2) {
+      value = *maskp;
+      *outu++ = ((*in2u++ * value) + (*in1u++ * (255 - value))) >> 8;
+      *outv++ = ((*in2v++ * value) + (*in1v++ * (255 - value))) >> 8;
+    }
+  }
+}
+
+static void
+gst_smpte_loop (GstElement *element)
+{
+  GstSMPTE *smpte;
+  GstBuffer *outbuf;
+  GstClockTime ts;
+  GstBuffer *in1 = NULL, *in2 = NULL;
+
+  smpte = GST_SMPTE (element);
+
+  ts = smpte->position * GST_SECOND;
+
+  if (GST_PAD_IS_USABLE (smpte->sinkpad1)) {
+    in1 = gst_pad_pull (smpte->sinkpad1);
+    ts = GST_BUFFER_TIMESTAMP (in1);
+  }
+  else {
+    in1 = gst_buffer_new_and_alloc (smpte->width * smpte->height * 3);
+    fill_i420 (GST_BUFFER_DATA (in1), smpte->width, smpte->height, 7);
+  }
+    
+  if (GST_PAD_IS_USABLE (smpte->sinkpad2)) {
+    in2 = gst_pad_pull (smpte->sinkpad2);
+    ts = GST_BUFFER_TIMESTAMP (in2);
+  }
+  else {
+    in2 = gst_buffer_new_and_alloc (smpte->width * smpte->height * 3);
+    fill_i420 (GST_BUFFER_DATA (in2), smpte->width, smpte->height, 0);
+  }
+
+  if (smpte->position < smpte->duration) { 
+    outbuf = gst_buffer_new_and_alloc (smpte->width * smpte->height * 3);
+
+    if (!GST_PAD_CAPS (smpte->srcpad)) {
+      if (!gst_pad_try_set_caps (smpte->srcpad,
+			    GST_CAPS_NEW (
+				    "smpte_srccaps",
+				    "video/raw",
+				      "format",   GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')),
+				      "width",    GST_PROPS_INT (smpte->width),
+				      "height",   GST_PROPS_INT (smpte->height)
+				    )))
+      {
+        gst_element_error (element, "cannot set caps");
+        return;
+      }
+    }
+
+    gst_mask_update (smpte->mask, smpte->position, smpte->duration);
+
+    gst_smpte_blend_i420 (GST_BUFFER_DATA (in1), GST_BUFFER_DATA (in2), GST_BUFFER_DATA (outbuf),
+	                  smpte->mask, smpte->width, smpte->height);
+  }
+  else {
+    outbuf = in2;
+    gst_buffer_ref (in2);
+  }
+
+  smpte->position++;
+
+  if (in1)
+    gst_buffer_unref (in1);
+  if (in2)
+    gst_buffer_unref (in2);
+
+  GST_BUFFER_TIMESTAMP (outbuf) = ts;
+  gst_pad_push (smpte->srcpad, outbuf);
+}
+
+static void
+gst_smpte_set_property (GObject *object, guint prop_id, 
+		        const GValue *value, GParamSpec *pspec)
+{
+  GstSMPTE *smpte;
+
+  smpte = GST_SMPTE(object);
+
+  switch (prop_id) {
+    case ARG_TYPE:
+    {
+      GstMask *newmask;
+      gint type = g_value_get_enum (value);
+
+      newmask = gst_mask_factory_new (type, 8, smpte->width, smpte->height);
+      if (newmask) {
+	if (smpte->mask) {
+          gst_mask_destroy (smpte->mask);
+	}
+	smpte->mask = newmask;
+	smpte->type = type;
+      }
+      break;
+    }
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_smpte_get_property (GObject *object, guint prop_id, 
+		        GValue *value, GParamSpec *pspec)
+{
+  GstSMPTE *smpte;
+
+  smpte = GST_SMPTE(object);
+
+  switch (prop_id) {
+    case ARG_TYPE:
+      if (smpte->mask) {
+	g_value_set_enum (value, smpte->mask->type);
+      }
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *factory;
+
+  factory = gst_element_factory_new("smpte",GST_TYPE_SMPTE,
+                                   &smpte_details);
+  g_return_val_if_fail(factory != NULL, FALSE);
+
+  gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (smpte_sink1_factory));
+  gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (smpte_sink2_factory));
+  gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (smpte_src_factory));
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "smpte",
+  plugin_init
+};
+